JP3899493B1 - Insulation foundation and construction method of insulation foundation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulating foundation capable of reliably preventing wood (such as a foundation) of a building on a foundation from being damaged by termites. Moreover, the construction method of the heat insulation foundation which can prevent that both heat insulating materials collide together by the pressure of laying concrete, and is damaged, etc. with simple structure and can improve a linear accuracy is provided.
A metal cover 41 is placed on an upper end surface portion 12 of a first heat insulating material 11 which comes into contact with the ground among both heat insulating materials (11, 21) forming a mold 10. The cover 41 is disposed so that the upper end surface portion 12 of the first heat insulating material 11 is tightly covered and one end thereof protrudes into the empty space S1, and the reinforcing rod 51 is fixed to the ground 9 at one end 52. The other end 53 is fixed to the cover 41, and then the concrete 5 is placed in the empty space S1 until the one end 42 of the cover 41 is buried.
[Selection] Figure 1

Description

  The present invention relates to a heat insulating foundation and a method for constructing a heat insulating foundation, in which a foamed synthetic resin heat insulating material becomes a formwork during foundation construction and is left for heat insulation even after foundation construction.

  Conventionally, when building a foundation of a building such as a house with concrete, a plywood or steel formwork is assembled on the ground, and then concrete is placed in an empty space formed by the formwork. In many cases, a method of removing the formwork was taken after the curing. In addition, when the building built on the foundation constructed by such a construction method requires heat insulation performance like a highly airtight and highly insulated house, a heat insulating material is retrofitted.

  However, in the above-described foundation construction method, there is a problem that it takes a lot of time and labor due to removing the formwork after the foundation construction and then applying the heat insulating material. In addition, when the heat insulating material is stretched, a gap is easily formed between the heat insulating material and the concrete, and the heat insulating performance is likely to be peeled off.

For this reason, recently, a construction method (insulation foundation construction method) in which a heat insulating material is used as a mold and is left behind after placing concrete has been gradually adopted (for example, see Patent Document 1). In this heat insulation foundation construction method, as shown in FIG. 8, a pair of heat insulation materials (61, 62) made of foamed synthetic resin are erected on a discarded concrete 65 at a predetermined distance to form a mold. Then, the concrete 64 is placed in the empty space (S1) between the two heat insulating materials (61, 62). At this time, a separator 63 is provided between the two heat insulating materials (61, 62), and the width of the empty space (S1) is held constant.
Japanese Patent Laid-Open No. 11-36587

  By the way, in the heat insulation foundation 60, how to prevent termite damage is an important issue. That is, in the above heat insulating foundation, a termite that has found the heat insulating material (for example, the heat insulating material 61 shown in FIG. 9) in contact with the ground 69 erodes a part of the heat insulating material (61) with its sharp fangs and easily enters the inside. It may enter. Here, the heat insulating material (61) is made of foamed resin (such as polystyrene foam), and even if termites eat it, it is not a tree, so it does not become nutritious and dies by diarrhea. There is a risk that it will climb over the heat insulating material (61) and create a tunnel-like road (ant road R) and reach the wooden base 66 of the building above the heat insulating foundation 60, etc. is there. When such a situation occurs, the wood (base 66, flooring, etc.) that constitutes a building such as a house will be severely damaged. In addition, since termites dislike the light of the sun, it is said that they do not climb the outer surface of the heat insulating material (61) and reach the base 66 or the like.

  Moreover, in the heat insulation foundation 60, as described above, the separator 63 is provided between the both heat insulating materials (61, 62), and both the heat insulating materials (61, 62) are moved outward by the pressure of the cast concrete 64. It is made not to be greatly bent and deformed. However, the heat insulating materials (61, 62) are made of foamed resin, and have a lower strength than conventional plywood and steel molds. In the case where the material (61 or 62) is contacted and pushed outward (pressing force F), both the heat insulating materials (61, 62) fall together outside while being kept at a constant distance by the separator 63. It will end up. Thereby, in both heat insulating materials (61, 62), an excessive bending stress is generated and a part thereof is damaged, or a plurality of heat insulating blocks (61a, 61b, 61a and 61b) may be damaged, and the concrete 64 may leak from the mold 60. Alternatively, there may be a case where the placed concrete 64 is hardened while being bent and the linear accuracy of the heat insulating foundation 60 is not obtained. That is, in FIG. 10, reference numeral 68 denotes a reference line on which the heat insulation foundation 60 is to be constructed, but the constructed heat insulation foundation 60 does not match the reference line 68. The same inconvenience occurs when the heat insulating material (61 or 62) is pushed inward.

  The objective of this invention is providing the heat insulation foundation which can prevent reliably wood, such as a foundation of the building on a foundation, from the damage by termite. In addition, with a simple structure, the wood of the building can be reliably prevented from being damaged by termites, and the concrete can be prevented from collapsing and being damaged by the concrete placement, and the cast concrete is bent. An object of the present invention is to provide a method for constructing a heat-insulating foundation that can prevent the straight-line accuracy of the foundation from being hardened.

The invention of claim 1 is to form a mold frame by placing a pair of heat-insulating materials made of foamed synthetic resin on abandoned concrete at a predetermined distance from each other and forming an empty space between the heat-insulating materials. a separator for holding the width constant provided, in the adiabatic basis are constructed Da設concrete to the empty space, the metallic covering in close contact with the upper end face of the heat insulating material in contact with the ground of the two heat insulating material A cover is provided , and the metal cover is formed to have both a back surface portion along the inner side surface of the heat insulating material and a protrusion portion that is bent from the back surface portion and extends in the horizontal direction, and the protrusion portion of the cover Is configured to be embedded in concrete placed in the empty space .

  In the case of the first aspect of the invention, the termite that finds the heat insulating material in contact with the ground may easily break into a part of the heat insulating material with its sharp fangs and easily enter the heat insulating material. The termites may dig up in the heat insulating material in large groups to create a tunnel-like road (ant road) reaching the upper end surface portion of the heat insulating material, and climb up to the upper end surface portion. However, the upper end surface portion of the heat insulating material is covered with a metal (for example, aluminum alloy) cover, and there is no gap between the cover and the placed concrete.

  Therefore, even if the termites climb the ant path in the heat insulating material and reach the upper end surface portion of the heat insulating material, they are blocked from going to the metal cover and cannot proceed to the base or the like above the upper end surface portion. Here, termites have sharp fangs, but not so much that they can punch through a metal cover. Therefore, termites do not reach the foundation of the building, and wood such as the foundation of the building can be prevented from being damaged by termites.

Here, since the cover is formed so that the upper end surface portion of the heat insulating material can be tightly covered, it is not particularly fixed to the heat insulating material by using an adhesive, and the cover is struck on the projecting portion when the concrete is placed. Even if buoyancy acts on the concrete, it will not lift. Further, since the cover is embedded in the concrete where the protruding portion is hardened, the cover does not come off from the upper end surface portion of the heat insulating material. In terms of the habit of hating sunlight, termites do not, for example, once go out of the heat insulating material and climb the outer surface of the cover to reach the foundation.

The invention of claim 2 is to form a formwork by placing a pair of heat insulating materials made of foamed synthetic resin facing each other at a predetermined distance on abandoned concrete, and the width of the space between the heat insulating materials. In the method for constructing a heat insulating foundation having a structure in which a separator that keeps constant is placed, and then concrete is placed in the empty space, the upper end surface portion of the heat insulating material that makes contact with the ground of the two heat insulating materials Are disposed so that the back surface portion extends along the inner side surface of the heat insulating material and the protruding portion that is bent from the back surface portion and extends in the horizontal direction protrudes into the empty space. One end is fixed to the ground at a predetermined distance from both heat insulating materials and the other end is fixed to the cover, and then the concrete is embedded in the empty space by the protruding portion of the cover. Characterized by pouring up.

  In the case of the second aspect of the invention, the following actions and effects are achieved with a simple configuration in which a heat insulating material is covered with a metal cover, and the cover is used as a scaffold and is stretched against the ground with a reinforcing rod. be able to. In other words, termites that have climbed up to the upper end surface of the heat insulating material while making an ant path in the heat insulating material in contact with the ground are prevented from reaching the base etc. Can not. Also, even when the cast concrete does not harden, for example, when an operator touches the heat insulating material and pushes it outward (or inside), the heat insulating material is reinforced with a reinforcing rod so that it does not fall easily. Therefore, there is no such thing as collapsing outside (or inside). Thereby, both the heat insulating materials do not generate excessive bending stress due to the joint collapse, and can be prevented from being damaged. In addition, there is no situation where the cast concrete hardens while being bent and the linear accuracy of the foundation does not appear.

  According to a third aspect of the present invention, both the heat insulating materials are formed by connecting a plurality of heat insulating blocks in series in the longitudinal direction of the foundation construction, and the cover is formed by a plurality of directly connected heat insulating blocks that are in contact with the ground. It is the structure which arrange | positions so that it may straddle and covers the upper end surface part of each said heat insulation block closely.

  In the case of the third aspect of the invention, the same effect as that of the second aspect of the invention is achieved, and the metal cover serves as a so-called ruler, and the plurality of heat insulating blocks are accurately straightened in the longitudinal direction of the foundation construction. The heat insulating material can be formed by connecting them in series. In addition, the cover covers the connection points of the respective heat insulating blocks connected in series, so that even if a large concrete pressure is applied to the connection points when placing the concrete, the connection points are not easily bent, and the structural strength of the heat insulating material is increased. Can be increased. Therefore, the structural strength of the formwork is further increased, and it is possible to prevent damage due to co-falling when placing both heat insulating materials into the concrete. In addition, the linear accuracy of the foundation is further improved.

  According to the invention of claim 1, termites that have made ant roads in the heat insulating material in contact with the ground and aimed at the foundation of the building are also blocked by the hand that goes to the metal cover. Can't reach. Therefore, it is possible to reliably prevent wood such as the foundation of the building on the foundation from being damaged by termites.

  According to invention of Claim 2, the heat insulation foundation which can prevent reliably wood, such as a foundation of the building on a foundation, from the damage by a termite can be constructed | assembled easily and rapidly. In addition, even if the worker does not solidify the cast concrete and, for example, the operator contacts the heat insulating material and accidentally pushes it outward (or inside), the heat insulating material is reinforced with a reinforcing rod. Since it is hard to fall down, it does not fall together outside (or inside). Thereby, it is possible to prevent the heat insulating material from being damaged without causing excessive bending stress due to collapsing. In addition, there is no situation where the cast concrete hardens while being bent and the linear accuracy of the foundation does not appear.

  According to the invention of claim 3, while having the same effect as that of the invention of claim 2, the metal cover serves as a so-called ruler, and a plurality of heat insulation blocks are accurately connected in series in the longitudinal direction of the foundation construction. Heat insulation can be formed. In addition, the cover also covers the connection places of the respective heat insulating blocks connected in series, so that it does not open even when a large concrete pressure is applied to the connection places when placing concrete. Therefore, the structural strength of the formwork is further increased, and it is possible to prevent damage due to co-falling when placing both heat insulating materials into the concrete. In addition, the linear accuracy of the foundation is further improved.

    Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, the heat insulating foundation 1 according to the present invention stands on a discarded concrete 7 with a pair of heat insulating materials (11, 21) made of foamed synthetic resin and spaced apart by a predetermined distance w0. In addition to forming the mold 10, a separator 31 is provided to keep the width (w 0) of the empty space S 1 between the heat insulating materials (11, 21) constant, and the concrete 5 is placed in the empty space S 1. The projecting portion (in this embodiment, one end portion 42) of the first heat insulating material 11 is embedded in the cast concrete 5 and comes into contact with the ground 9 after construction. A metal cover 41 that covers the upper end surface portion 12 in close contact is provided.

  The construction method of the heat insulation foundation 1 will be described in detail below.

(A) As shown in FIG. 2, the first heat insulating material 11 and the second heat insulating material 21 are erected on the discarded concrete 7 at a predetermined distance w0 (for example, w0 = 150 mm). The first heat insulating material 11 is formed by connecting a plurality of heat insulating blocks 13 having the shape shown in FIG. 5 in series in the basic construction longitudinal direction (arrow (E, F) direction in FIG. 7). Similarly, the second heat insulating material 21 is formed by connecting a plurality of heat insulating blocks 23 shown in FIG. 6 in series in the directions of arrows (E, F) in FIG. In this embodiment, the 1st heat insulating material 11 becomes the outer side (left side in FIG. 3) of this heat insulation foundation 1, and the 2nd heat insulating material 21 becomes the inner side (right side in FIG. 3) of this heat insulation foundation 1.

  Each heat insulation block (13, 23) is formed from a plate-like hard foamed resin (for example, polystyrene foam). More specifically, as shown in FIG. 5, each heat insulation block 13 has a horizontal dimension L1 of 1365 mm, a vertical dimension L2 of 720 mm, and a thickness w2 of 50 mm, and a corner on the front side of the upper end surface portion 13a. Is cut diagonally. Further, as shown in FIG. 6, each heat insulation block 23 has a horizontal dimension L3 of 1365 mm, a vertical dimension L4 of 370 mm, and a thickness w3 of 50 mm.

  Each heat insulation block 13 is connected in series in the foundation construction longitudinal direction (in the direction orthogonal to the paper surface in FIG. 2) on the discarded concrete 7 shown in FIG. 2 to form the first heat insulating material 11. Further, the second heat insulating material 21 is formed by connecting each heat insulating block 23 in series with the first heat insulating material 11 being separated from the first heat insulating material 11 by a predetermined distance w0 on the concrete 7 by way of the floating hardware 22. This is because the rising portion 2 of the heat insulating foundation 1 and the inner soil concrete 8 are formed together. In FIG. 2, reference numeral 35 denotes a reinforcing bar.

(B) A separator 31 is set between the first heat insulating material 11 and the second heat insulating material 21. The separator 31 serves to keep the width w0 of the empty space S1 between the two heat insulating materials (11, 21) constant.

(C) As shown in FIG. 7, the metal cover 41 is disposed (covered) so as to straddle a plurality of (for example, two) heat insulating blocks 13 that form the first heat insulating material 11. The upper end surface portion 13a of each heat insulating block 13 is covered and covered. Here, the cover 41 is formed to extend linearly over its entire length L6. More specifically, the cover 41 is formed by bending an aluminum alloy plate, and as shown in FIGS. 4A and 4B, covers the upper end surface portion 13a of the heat insulation block 13 slightly tightly. It is a form that can be. Therefore, the width w3 of the recessed portion 44 of the cover 41 is selected to be slightly larger than the thickness w2 [w2 = 50 mm] of the heat insulating block 13. In this embodiment, w3 = 50.1 mm. 4A is a side view, and FIG. 4B is a plan view. More specifically, the cover 41 has both a back surface portion 49 along the inner surface of the first heat insulating material 11 and a protruding portion (one end portion 42) that is bent from the back surface portion 49 and extends in the horizontal direction. Is formed.

(D) As shown in FIG. 2, the pile 6 is driven into the ground 9 separated from the formwork 10 by a predetermined distance L 7, and one end 52 of the reinforcing rod 51 is fixed to the pile 6 with a nail or the like. Then, the other end portion 53 of the reinforcing rod 51 is fixed to the upper end surface portion 13a of the cover 41 with a nail or the like. At this time, since the front surface portion of the upper edge surface portion of the cover 41 is inclined, the other end portion 53 of the reinforcing rod 51 can be stably placed and fixed with a nail or the like.

(E) The concrete 5 is placed in the empty space S1 between the two heat insulating materials (11, 21). As shown in FIG. 1, when the cast concrete 5 is cured, one end portion 42 of the cover 41 is embedded in the concrete 5, and the rising portion 2 of the heat insulating foundation 1 and the soil concrete 8 are formed together. .

  In this heat insulation base 1 having the above configuration, as shown in FIG. 3, when even one termite enters the inside of the heat insulating material 11 in contact with the ground 9, the termites dig into the heat insulating material 11 in large groups. Thus, the upper end surface portion 12 of the heat insulating material 11 (upper end surface portion 13a of each heat insulating material 13) may be climbed while forming a tunnel-like road (ant road R). However, the upper end surface portion 12 of the heat insulating material 11 is covered with a metal cover 41, and there is no gap between the cover 41 and the concrete 5.

  Therefore, even if the termites reach the upper end surface portion 12 of the heat insulating material 11, the hand going to the metal cover 41 is blocked and cannot proceed to the base 4 or the like above it. Here, the termites have sharp fangs, but not so much that they can pierce the metal cover 41. Therefore, termites do not reach the base 4 of the building and can prevent the termite from being damaged by the wood of the building. The termite (white ant) is a general term for termites (Isopods). For example, there are Yamato termites and termites.

  Here, since the cover 41 is formed so as to cover the upper end surface portion 12 of the first heat insulating material 11 in close contact with each other, it is possible to place the concrete without fixing it to the heat insulating material 11 using an adhesive. Sometimes, even if the buoyancy of the cast concrete 5 acts on the one end portion 42, it does not float. Moreover, since the one end part 42 of the cover 41 is embedded in the concrete 5 which hardens after placement, it does not come off from the upper end surface part 12 of the heat insulating material 11. In terms of the habit of hating sunlight, the termites never go out of the heat insulating material 11 and climb the outer surface of the cover 41 to reach the base 4 or the like.

  Moreover, in the construction method of the heat insulation foundation 1 having the above-described configuration, for example, an operator contacts one (or both) of both heat insulating materials (11, 21) before the cast concrete 5 is hardened, and the outside (or the inside). Even if it is pushed, the both heat insulating materials (11, 21) are reinforced by the reinforcing rod 51 provided with the cover 41 as a scaffold and are difficult to fall down. There is no such thing. Thereby, both the heat insulating materials (11, 21) do not generate excessive bending stress due to the joint collapse, and can prevent damage. In addition, there is no situation where the cast concrete 5 is hardened while being bent and the linear accuracy of the heat insulating foundation 1 is not obtained.

  Further, since the metal cover 41 is disposed so as to straddle the plurality of heat insulation blocks 13 and covers the upper end surface portion 13a of each heat insulation block 13, the linear cover 41 serves as a so-called ruler. The first heat insulating material 11 can be formed by accurately connecting the heat insulating blocks 13 in series in the foundation construction longitudinal direction. The second heat insulating material 21 regulated in the width direction through the first heat insulating material 11 and the separator 5 can also be accurately connected in series.

  Moreover, the cover 41 will cover the connection location of each heat insulation block 13 connected in series, and even if a large concrete pressure is applied to the connection location at the time of concrete placement, the connection location is difficult to open, and the insulation material 11 The structural strength can be increased. The structural strength of the second heat insulating material 21 connected in the width direction via the first heat insulating material 11 and the separator 31 is also increased. Therefore, the structural strength of the mold 10 is further increased, and damage due to co-falling of the two heat insulating materials (11, 21) during concrete placement can be prevented. Moreover, the linear accuracy of the heat insulation foundation 1 is further improved.

It is a figure for demonstrating the heat insulation foundation which concerns on this invention. It is a figure for demonstrating the construction method of a heat insulation foundation. It is a figure for demonstrating the function which prevents the damage by the termite of the heat insulation foundation which concerns on this invention. It is a figure for demonstrating metal-made covers. It is a figure for demonstrating the heat insulation block which forms a 1st heat insulating material. It is a figure for demonstrating the heat insulation block which forms a 2nd heat insulating material. It is a figure for demonstrating the setting method of a cover. It is a figure for demonstrating the conventional heat insulation foundation. It is a figure for demonstrating the problem (1) of the conventional heat insulation foundation. It is a figure for demonstrating the problem (2) of the conventional heat insulation foundation.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat insulation foundation 2 Standing part of heat insulation foundation 4 Foundation 5 Concrete 7 Discarded concrete 9 Ground 10 Form 11 First heat insulating material 12 Upper surface part 13 Heat insulating block 13a Upper surface part 21 Second heat insulating material 23 Heat insulating block 31 Separator 41 Metal Cover 42 One end 51 Reinforcing bar 52 One end 53 The other end

Claims (3)

A separator that holds a pair of insulation materials made of foamed synthetic resin in a plate shape on abandoned concrete so as to stand at a predetermined distance to form a mold, and keeps the width of an empty space between both insulation materials constant In the heat insulation foundation constructed by placing concrete in the empty space ,
The provided metal cover for covering in close contact with the upper end face of the heat insulating material in contact with the ground, of the two insulation the metal cover is bent from the rear portion and the rear portion along the inner surface of the heat insulating material And a projecting portion extending in a horizontal direction, and the projecting portion of the cover is embedded in concrete placed in the empty space . On the discarded concrete, a pair of heat insulating materials made of foamed synthetic resin facing each other with a predetermined distance is formed to form a mold, and a separator that keeps the width of the empty space between both the heat insulating materials constant In the construction method of the heat insulation foundation configured to place and then place concrete in the empty space,
The metal cover covers the upper end surface portion of the heat insulating material that comes into contact with the ground out of the two heat insulating materials in close contact with each other, and the back surface portion extends along the inner surface of the heat insulating material and is bent from the back surface portion to extend in the horizontal direction. The protruding portion is arranged so as to protrude into the empty space, and one end of the reinforcing rod is fixed to the ground at a predetermined distance from the both heat insulating materials, and the other end is fixed to the cover. The method for constructing a heat insulation foundation, wherein concrete is placed in the empty space until the protruding portion of the cover is buried.   Each of the heat insulating materials is formed by connecting a plurality of heat insulating blocks in series in the longitudinal direction of the foundation construction, and the cover is disposed so as to straddle a plurality of directly connected heat insulating blocks contacting the ground. The construction method of a heat insulation foundation according to claim 2, wherein the upper end surface portion of each heat insulation block is closely covered.

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